EXPLANATION OF THE PLATES. 



PLATE XIX. 



FAT. 



Fig. 1. Fat vesicles of the pig, in which the appearance of a 

 nucleus was produced by moderate compression be- 

 tween two plates of glass. 



Fig. 2. The fat vesicles of the pig ruptured by compression 

 between two plates of glass : the contents of the 

 cells are seen escaping from their enclosing mem- 

 branes. 



Fig. 3. Fat cells, forming part of the marrow contained in 

 the femur of a child aged about ten years ; in these 

 a large nucleus-like body is visible, the formation 

 of which probably depended upon a change in the 

 condition of the contents of the cells induced by 

 decomposition. 



Fig. 4. The same cells in a further stage of decomposition : 

 the membranes of the cells have become ruptured, 

 and are clearly seen broken and empty, lying beside 

 their escaped contents, which either become broken 

 up and assume the form of drops of oil of different 

 sizes, or remain entire, in which case they fre- 

 quently exhibit the crystalline appearance por- 

 trayed in figure 5. 



Fig. 5. Human fat vesicles, on the surface of which crystals, 

 supposed to be those of margaric acid, radiating 

 from a centre, have appeared ; their presence is to 

 be regarded as an indication that decomposition has 

 begun to affect the contents of the cells. 



Fig. 6. Fat cells, contained in a small melicerous tumour 

 removed from over the nasal bones, in all of which 

 a nucleus-like body was clearly visible. 



The tumour from which the figure was taken 



O 



was kindly forwarded for examination by Mr. 

 Ransom, of the University College Hospital. 

 m 



